Jamaica's Yohan Blake won the world championships 100m final on Sunday after hot favourite and defending champion Usain Bolt false started.
Bolt, running in lane five, went early, stunning a hugely expectant crowd in Daegu who looked on shocked as the distraught superstar ripped off his shirt and held his head in disbelief before leaving the track.
But Blake held his nerve for the restart and powered to victory, setting his season's best time of 9.92sec with American Walter Dix second (10.08) and veteran Kim Collins of St Kitts and Nevis winning bronze (10.09).
"I can't find words to explain it. Usain Bolt has been there for me. I feel like I want to cry," said Blake, Bolt's training partner under coach Glen Mills.
"I've been trained by one of the best coaches, but I stayed cool and caught him (Collins). I felt I would win the race for Bolt."
Bolt, the most marketable sportsman on the globe, has dominated the sprinting world in recent years.
After storming to the 100m and 200m sprint double in then-world record times at the 2008 Olympics, Bolt matched his feat the following year at the Rome worlds, setting new marks of 9.58 and 19.19sec.
The event in Daegu was deprived of the three previous fastest men this year -- Bolt's team-mate Asafa Powell, American Tyson Gay, and Jamaican Steve Mullings.